I used to spend a lot of time flying and, thankfully, I've always found it easy to sleep on planes. However, a few years back a colleague was building a server

I used to spend a lot of time flying and, thankfully, I've always found it easy to sleep on planes. However, a few years back a colleague was building a server on a desk near me and it sounded very like the inside of a plane and I became very drowsy almost immediately!